package com.map;

import java.util.HashMap;

/**
 * @description:
 * @author: 孙 峰
 * @time: 2020/11/5 12:36
 */
public class HashMapTest {
    public static void main(String[] args) {
        HashMap<String, String> map = new HashMap<String,String>();
        String put = map.put("s", "a");
    }
}
